"And it's fast. The demo level we're shown gets right to it. There are 16 racers on the screen, and the player's rider is bouncing around and twisting the handlebars to steer (we later sit through a lecture about how the bike and machine are treated as separate objects, which helps), dirt is flying up in his wake and the barren, mountainous environment is convincing enough to bring back memories of bygone holidays. Suddenly he's in the air. The camera pans out and ground disappears, as does the music and audio in favour of a falling-bomb whistling sound. If you've ever jumped off a rooftop in Assassin's Creed, you know the feeling; breathtaking, and still on a small scale relative to perils buried deeper in the game. All the while we sit there gawping at this, however, our demonstrator is doing handstands on his quad-bike."

They're fine. I actually prefer an always connected experience.
I'd really prefer an offline way to play, but its not a bother.
I don't really like them, and am more reluctant to buy a game because of it.
I won't buy them. I want my games offline.